Numbers and predicates

The arithmetic and comparison core, plus the type predicates. The comparisons answer true/false; every predicate treats nil and false as distinct values.

Name	Example	Result
`+`	`(+ 1 2 3)`	`6`
`-`	`(- 10 4)`	`6`
`*`	`(* 2 3 4)`	`24`
`/`	`(/ 7 2)`	`7/2`
`quot`	`(quot 7 2)`	`3`
`rem`	`(rem 7 2)`	`1`
`mod`	`(mod -7 2)`	`1`
`abs`	`(abs -5)`	`5`
`max`	`(max 3 9 4)`	`9`
`min`	`(min 3 9 4)`	`3`
`expt`	`(expt 2 10)`	`1024`
`inc`	`(inc 5)`	`6`
`dec`	`(dec 5)`	`4`
`=`	`(= 1 1)`	`true`
`not=`	`(not= 1 2)`	`true`
`==`	`(== 1 1.0)`	`true`
`<`	`(< 1 2)`	`true`
`>`	`(> 2 1)`	`true`
`<=`	`(<= 2 2)`	`true`
`>=`	`(>= 3 4)`	`false`
`nil?`	`(nil? nil)`	`true`
`some?`	`(some? nil)`	`false`
`even?`	`(even? 2)`	`true`
`odd?`	`(odd? 2)`	`false`
`zero?`	`(zero? 0)`	`true`
`pos?`	`(pos? -1)`	`false`
`neg?`	`(neg? -1)`	`true`
`false?`	`(false? false)`	`true`
`true?`	`(true? true)`	`true`
`boolean?`	`(boolean? false)`	`true`
`coll?`	`(coll? [1])`	`true`
`string?`	`(string? "a")`	`true`
`symbol?`	`(symbol? 'a)`	`true`
`fn?`	`(fn? inc)`	`true`
`instance?`	`(instance? String "a")`	`true`
`class`	`(class "a")`	`:string`
`int`	`(int 2.7)`	`2`
`long`	`(long -2.7)`	`-2`
`double`	`(double 1)`	`1.0`
`float`	`(float 1/2)`	`0.5`
`byte`	`(byte 1.9)`	`1`
`short`	`(short 1.9)`	`1`
`num`	`(num 1/2)`	`1/2`
`bigint`	`(bigint 7/2)`	`3`
`biginteger`	`(biginteger 7/2)`	`3`
`bigdec`	`(bigdec 0.5)`	`1/2`
`rationalize`	`(rationalize 0.1)`	`1/10`
`numerator`	`(numerator 6/4)`	`3`
`denominator`	`(denominator 6/4)`	`2`
`boolean`	`(boolean 1)`	`true`
`char`	`(char 97)`	`a`
`rand`	`(rand 5)`	a double in `[0,5)`
`rand-int`	`(rand-int 1)`	`0`
`unchecked-add`	`(unchecked-add 9223372036854775807 1)`	`-9223372036854775808`
`unchecked-subtract`	`(unchecked-subtract -9223372036854775808 1)`	`9223372036854775807`
`unchecked-multiply`	`(unchecked-multiply 4611686018427387904 4)`	`0`
`unchecked-inc`	`(unchecked-inc 9223372036854775807)`	`-9223372036854775808`
`unchecked-dec`	`(unchecked-dec -9223372036854775808)`	`9223372036854775807`
`unchecked-negate`	`(unchecked-negate -9223372036854775808)`	`-9223372036854775808`
`unchecked-add-int`	`(unchecked-add-int 2147483647 1)`	`-2147483648`
`unchecked-subtract-int`	`(unchecked-subtract-int -2147483648 1)`	`2147483647`
`unchecked-multiply-int`	`(unchecked-multiply-int 65536 65536)`	`0`
`unchecked-inc-int`	`(unchecked-inc-int 2147483647)`	`-2147483648`
`unchecked-dec-int`	`(unchecked-dec-int -2147483648)`	`2147483647`
`unchecked-negate-int`	`(unchecked-negate-int -2147483648)`	`-2147483648`
`unchecked-divide-int`	`(unchecked-divide-int -7 2)`	`-3`
`unchecked-remainder-int`	`(unchecked-remainder-int -7 2)`	`-1`
`unchecked-int`	`(unchecked-int 2147483648)`	`-2147483648`
`unchecked-long`	`(unchecked-long 7/2)`	`3`
`unchecked-short`	`(unchecked-short 70000)`	`4464`
`unchecked-byte`	`(unchecked-byte 200)`	`-56`
`unchecked-char`	`(unchecked-char 97)`	`a`
`unchecked-double`	`(unchecked-double 1)`	`1.0`
`unchecked-float`	`(unchecked-float 1/2)`	`0.5`